WO2017150608A1 - Insert de coupe et outil de coupe - Google Patents

Insert de coupe et outil de coupe Download PDF

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Publication number
WO2017150608A1
WO2017150608A1 PCT/JP2017/008102 JP2017008102W WO2017150608A1 WO 2017150608 A1 WO2017150608 A1 WO 2017150608A1 JP 2017008102 W JP2017008102 W JP 2017008102W WO 2017150608 A1 WO2017150608 A1 WO 2017150608A1
Authority
WO
WIPO (PCT)
Prior art keywords
cutting insert
cutting edge
straight
reference side
cutting
Prior art date
Application number
PCT/JP2017/008102
Other languages
English (en)
Japanese (ja)
Inventor
優太 森崎
Original Assignee
住友電工ハードメタル株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 住友電工ハードメタル株式会社 filed Critical 住友電工ハードメタル株式会社
Priority to US16/073,004 priority Critical patent/US10632547B2/en
Priority to EP17760072.3A priority patent/EP3424631B1/fr
Priority to EP22188553.6A priority patent/EP4101567A1/fr
Priority to CN201780014906.0A priority patent/CN108778591B/zh
Publication of WO2017150608A1 publication Critical patent/WO2017150608A1/fr
Priority to US16/821,542 priority patent/US11167361B2/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C5/00—Milling-cutters
    • B23C5/16—Milling-cutters characterised by physical features other than shape
    • B23C5/20—Milling-cutters characterised by physical features other than shape with removable cutter bits or teeth or cutting inserts
    • B23C5/202—Plate-like cutting inserts with special form
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C5/00—Milling-cutters
    • B23C5/02—Milling-cutters characterised by the shape of the cutter
    • B23C5/06—Face-milling cutters, i.e. having only or primarily a substantially flat cutting surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C5/00—Milling-cutters
    • B23C5/16—Milling-cutters characterised by physical features other than shape
    • B23C5/20—Milling-cutters characterised by physical features other than shape with removable cutter bits or teeth or cutting inserts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B27/00—Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor
    • B23B27/22—Cutting tools with chip-breaking equipment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2200/00—Details of milling cutting inserts
    • B23C2200/04—Overall shape
    • B23C2200/0416—Irregular
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2200/00—Details of milling cutting inserts
    • B23C2200/04—Overall shape
    • B23C2200/0494—Rectangular
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2200/00—Details of milling cutting inserts
    • B23C2200/08—Rake or top surfaces
    • B23C2200/083—Rake or top surfaces curved
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2200/00—Details of milling cutting inserts
    • B23C2200/08—Rake or top surfaces
    • B23C2200/085—Rake or top surfaces discontinuous
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2200/00—Details of milling cutting inserts
    • B23C2200/20—Top or side views of the cutting edge
    • B23C2200/203—Curved cutting edges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2200/00—Details of milling cutting inserts
    • B23C2200/28—Angles
    • B23C2200/287—Positive rake angles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2200/00—Details of milling cutting inserts
    • B23C2200/28—Angles
    • B23C2200/291—Variable rake angles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2200/00—Details of milling cutting inserts
    • B23C2200/36—Other features of the milling insert not covered by B23C2200/04 - B23C2200/32
    • B23C2200/367—Mounted tangentially, i.e. where the rake face is not the face with largest area

Definitions

  • the present invention relates to a cutting insert and a cutting tool.
  • the present application claims priority based on Japanese Patent Application No. 2016-041176, which is a Japanese patent application filed on March 3, 2016. All the descriptions described in the Japanese patent application are incorporated herein by reference.
  • the main cutting edge is formed in the boundary part of the 1st surface in which the hole for fixation of the said cutting insert was formed, and the 2nd surface which is a side surface adjacent to the said 1st surface.
  • the shape of the main cutting edge viewed from the first surface side may be an arc or a straight line.
  • the cutting insert which concerns on 1 aspect of this invention is equipped with the main body which has a 1st surface, a 2nd surface, and a 3rd surface.
  • the second surface is continuous with the first surface and extends in a direction intersecting the first surface.
  • the third surface is continuous with the first surface and the second surface.
  • a fixing hole is formed on the first surface.
  • the second surface includes a rake surface.
  • the boundary with the first surface is the main cutting edge.
  • the main cutting edge viewed from the first surface side includes a first straight portion, a second straight portion, and a curved portion.
  • the first straight line portion is located on the reference side that is the boundary between the first surface and the third surface.
  • the second straight portion is disposed at a distance from the first straight portion.
  • the curved portion connects the first straight portion and the second straight portion.
  • the first crossing angle of the first straight line portion with respect to the reference side is different from the second crossing angle of the second straight line portion with respect to the reference side.
  • FIG. 1 is a schematic front view of a cutting insert according to Embodiment 1.
  • FIG. FIG. 2 is a schematic side view of the cutting insert shown in FIG.
  • FIG. 3 is a schematic bottom view of the cutting insert shown in FIG. 4 is a schematic cross-sectional view taken along line IV-IV in FIG.
  • FIG. 5 is a schematic diagram for explaining the configuration of the main cutting edge of the cutting insert shown in FIG. 1.
  • FIG. 6 is a schematic diagram for explaining the configuration of the main cutting edge of the cutting insert shown in FIG. 1.
  • FIG. 7 is a schematic front view of the cutting insert according to the second embodiment.
  • FIG. 8 is a schematic side view of the cutting insert shown in FIG.
  • FIG. 9 is a schematic bottom view of the cutting insert shown in FIG.
  • FIG. 10 is a schematic sectional view taken along line XX in FIG.
  • FIG. 11 is a schematic diagram for explaining the configuration of the main cutting edge of the cutting insert according to the third embodiment.
  • FIG. 12 is a schematic
  • a boundary between the first surface and the third surface continuous with the first surface and the second surface is considered as a reference side.
  • the strength of the cutting edge of the main cutting edge can be increased.
  • the inclination angle of the cutting edge may be relatively small, or the inclination angle may be negative. In such a case, the cutting property (cutness) of the cutting insert may be deteriorated.
  • the crossing angle is relatively small, the inclination angle of the cutting edge can be relatively large, so that the cutting performance of the cutting insert can be improved.
  • the strength of the edge of the main cutting edge may be reduced.
  • the cutting insert according to one aspect of the present disclosure is: (1) A cutting insert 1 including a main body having a first surface 2, a second surface 4, and a third surface 8.
  • the second surface 4 is continuous with the first surface 2 and extends in a direction intersecting the first surface 2.
  • the third surface 8 is continuous with the first surface 2 and the second surface 4.
  • a fixing hole 32 is formed in the first surface 2.
  • the second surface 4 includes a rake surface.
  • the boundary with the first surface 2 is the main cutting edge 6.
  • the main cutting edge 6 viewed from the first surface 2 side includes a first straight part 6a, a second straight part 6d, and a curved part.
  • the first straight line portion 6a is located on the reference side 11 side that is the boundary between the first surface 2 and the third surface.
  • the second straight part 6d is arranged at a distance from the first straight part 6a.
  • the curved portion connects the first straight portion 6a and the second straight portion 6d.
  • the first intersection angle ⁇ 1 of the first straight line portion 6a with respect to the reference side 11 is different from the second intersection angle ⁇ 2 of the second straight line portion 6d with respect to the reference side 11.
  • the shape of the main cutting edge 6 viewed from the first surface 2 side does not have the same configuration with respect to the entire width such as a linear shape, but the first is different in the crossing angles ⁇ 1 and ⁇ 2 with respect to the reference side 11. And it can form so that it may have the 2nd straight parts 6a and 6d.
  • the degree of freedom in adjusting the shape of the main cutting edge 6 so as to improve both the machinability and the edge strength can be increased.
  • by adjusting the shape of the main cutting edge 6 it is possible to obtain the cutting insert 1 with improved machinability and edge strength.
  • the main cutting edge as a whole can have a smooth shape with no corners, it is possible to suppress the occurrence of a problem that the cutting surface of the workpiece is rough due to the presence of the corners.
  • the curved portion has a first curved portion 6b that is convex in a direction away from the fixing hole 32 when viewed from the first surface 2 side, and a convex portion on the fixing hole 32 side. And the second curved portion 6c.
  • the shape of the connecting portion between the first straight portion 6a and the second straight portion 6d can be a smooth curve. For this reason, since the stress concentration in the said connection part can be suppressed rather than the case where the said connection part contains a corner
  • the radius of curvature of the first curved portion 6b may be different from the radius of curvature of the second curved portion 6c.
  • the positions of both ends of the curved portion can be arbitrarily set by appropriately adjusting the two radii of curvature. For this reason, even if the extending directions of the first straight portion and the second straight portion are individually changed, the first straight portion and the second straight portion can be easily connected by the curved portion. it can.
  • the first surface 2 may include a flank 31 connected to the main cutting edge 6.
  • the first width W4 in the direction along the reference side 11 of the portion adjacent to the first straight line portion 6a is in the direction along the reference side 11 of the portion adjacent to the second straight line portion 6d. It may be different from the second width W5.
  • the width of the flank 31 can be adjusted in accordance with each cutting condition even if the first straight portion 6a and the second straight portion 6d have different extending directions and have different cutting conditions. it can. For this reason, high machinability can be obtained.
  • the main cutting edge 6 viewed from the second surface 4 side may be curved as shown in FIG.
  • the center C of the radius of curvature of the main cutting edge 6 viewed from the second surface 4 side may be located closer to the third surface 8 than the fixing hole 32. Also in this case, high machinability can be obtained.
  • the difference between the first intersecting angle ⁇ 1 and the second intersecting angle ⁇ 2 may be 1 ° or more and 5 ° or less.
  • the radius of curvature at the curved portion can be increased to some extent, and as a result, the first straight portion 6a and the second straight portion 6d can be smoothly connected. As a result, the cutting surface of the workpiece can be prevented from being rough.
  • the first intersection angle ⁇ 1 may be not less than 80 ° and not more than 85 °. In this case, the edge strength of the main cutting edge 6 in the region located on the boundary portion side between the first straight portion 6a and the reference side 11 can be sufficiently increased.
  • the first intersection angle ⁇ 1 may be larger than the second intersection angle ⁇ 2. In this case, the edge strength of the region located on the boundary portion side between the first straight portion 6a and the reference side 11 is sufficiently increased, and the inclination angle of the cutting edge in the second straight portion 6d is set to the first straight line. It can be larger than the inclination angle of the cutting edge in the portion 6a. As a result, the machinability can be improved.
  • the inclination angle means an angle formed by a perpendicular to the surface to be processed of the workpiece and the cutting edge when the workpiece is cut by the cutting insert 1.
  • the cutting insert according to one aspect of the present disclosure is: (8) A cutting insert 1 including a main body having a first surface 2, a second surface 4, and a third surface 8.
  • the second surface 4 is continuous with the first surface 2 and extends in a direction intersecting the first surface 2.
  • the third surface 8 is continuous with the first surface 2 and the second surface 4.
  • a fixing hole 32 is formed in the first surface 2.
  • the second surface 4 includes a rake surface. Of the outer periphery of the second surface 4, the boundary with the first surface 2 is the main cutting edge 6.
  • the main cutting edge 6 viewed from the first surface 2 side includes a first straight part 6a, a second straight part 6d, and a curved part.
  • the first straight line portion 6a is located on the reference side 11 side that is the boundary between the first surface 2 and the third surface.
  • the second straight part 6d is arranged at a distance from the first straight part 6a.
  • the curved portion connects the first straight portion 6a and the second straight portion 6d.
  • the first intersection angle ⁇ 1 of the first straight line portion 6a with respect to the reference side 11 is larger than the second intersection angle ⁇ 2 of the second straight line portion 6d with respect to the reference side 11.
  • the first surface 2 includes a flank 31 that continues to the main cutting edge 6. In the flank 31, the first width W4 in the direction along the reference side 11 of the portion adjacent to the first straight line portion 6a is in the direction along the reference side 11 of the portion adjacent to the second straight line portion 6d. Different from the second width W5.
  • the cutting tool 20 includes: (9) A cutter body 21 having an outer peripheral surface and the cutting insert 1 according to any one of the above (1) to (8) are provided.
  • the cutting insert 1 is fixed to the outer peripheral surface. In this way, by using the cutting insert 1 having excellent cutting edge strength and machinability, it is possible to obtain a cutting tool 20 capable of performing highly efficient cutting by increasing the amount of cutting at the time of cutting. it can.
  • the cutting insert 1 shown in FIGS. 1 to 6 is a cutting insert 1 having a main body having a first surface 2, a second surface 4, and a third surface 8.
  • the planar shape of the first surface 2 as the upper surface is a substantially parallelogram shape.
  • the shape of the lower surface 3 located on the side opposite to the first surface 2 is basically the same as that of the first surface 2.
  • the second surface 4 as a side surface extends in a direction that is continuous with the first surface 2 and intersects the first surface 2.
  • the planar shape of the second surface 4 is a substantially rectangular shape.
  • the third surface 8 is continuous with the first surface 2 and the second surface 4.
  • the planar shape of the third surface 8 is a substantially parallelogram shape.
  • the third surface 8 is composed of two inclined surfaces arranged so that the central portion protrudes.
  • a fixing hole 32 is formed in the first surface 2.
  • the fixing hole 32 is formed at a substantially central portion of the first surface 2. As shown in FIG. 4, the fixing hole 32 is formed so as to penetrate the main body from the first surface 2 to the lower surface 3. As will be described later, when the cutting insert 1 is fixed to the cutter body of the cutting tool, the fixing hole 32 is inserted into the fixing hole 32.
  • the boundary with the first surface 2 is the main cutting edge 6.
  • Two opposing long sides of the first surface 2 are main cutting edges 6.
  • the boundary between the outer periphery of the second surface 4 and the lower surface 3 is also another main cutting edge 6.
  • the main cutting edge 6 at the boundary with the first surface 2 and the other main cutting edge 6 at the boundary with the lower surface 3 cross each other as shown in FIG. It is formed to extend.
  • the cutting insert 1 has four main cutting edges 6.
  • the main cutting edge 6 viewed from the first surface 2 side includes a first straight part 6a, a second straight part 6d, and a curved part.
  • the first straight portion 6 a is located on the reference side 11 side that is the boundary between the first surface 2 and the third surface 8.
  • a portion (short side) continuous with the first straight portion 6 a is a sub-cutting edge 7.
  • the main cutting edge 6 and the sub cutting edge 7 are connected by a curved connection part (nose part).
  • the second surface 4 includes a rake face at a portion adjacent to the main cutting edge 6 or the sub cutting edge 7.
  • the first straight portion 6 a side of the main cutting edge 6 is first cut into the surface of the workpiece.
  • the second straight part 6d is arranged at a distance from the first straight part 6a. That is, the second straight line portion 6d is disposed at a position farther from the first straight line portion 6a when viewed from the reference side 11.
  • the curved portion connects the first straight portion 6a and the second straight portion 6d.
  • the curved portion includes a first curved portion 6b that is convex in a direction away from the fixing hole 32 and a second curved portion 6c that is convex toward the fixing hole 32 when viewed from the first surface 2 side. It is out. That is, the curved portion includes two first curved portion 6b and second curved portion 6c that are convex in opposite directions.
  • the above-described curved portion includes two curved portion portions, the curved portion may include three or more, or four or more and a plurality of curved portions.
  • the curvature radius R1 of the first curved portion 6b and the curvature radius R2 of the second curved portion 6c may be different from each other, but these curvature radii R1 and R2 are mutually different. It may be the same. Moreover, even if it is a case where a curved part contains three or more curved parts, the curvature radius of each curved part may differ similarly, and may be the same.
  • the first intersection angle ⁇ 1 of the first straight line portion 6a with respect to the reference side 11 is different from the second intersection angle ⁇ 2 of the second straight line portion 6d with respect to the reference side 11.
  • the difference between the first intersection angle ⁇ 1 and the second intersection angle ⁇ 2 is 1 ° or more and 5 ° or less.
  • the difference may be 4 ° or less, or 3 ° or less. Further, the difference may be 2 ° or more.
  • the first intersection angle ⁇ 1 is not less than 80 ° and not more than 85 °.
  • the first intersection angle ⁇ 1 may be 84 ° or less, or 83 ° or less.
  • the first intersection angle ⁇ 1 may be 81 ° or more, or 82 ° or more.
  • the first surface 2 includes a flank 31 connected to the main cutting edge 6.
  • the first width W4 in the direction along the reference side 11 of the portion adjacent to the first straight line portion 6a is in the direction along the reference side 11 of the portion adjacent to the second straight line portion 6d. It is different from the second width W5.
  • the second width W5 is larger than the first width W4, but the flank 31 may be formed so that the second width W5 is smaller than the first width W4. . Further, the flank 31 may be formed so that the first width W4 and the second width W5 are the same.
  • the extending direction of the flank 31 intersects with the extending direction of the central portion where the fixing hole 32 of the first surface 2 is formed.
  • An intersection angle ⁇ 3 between the extending direction of the flank 31 and the extending direction of the central portion of the first surface 2 is set to 5 °, for example.
  • the intersection angle ⁇ 3 may be, for example, 1 ° to 10 °.
  • the lower limit of the intersection angle ⁇ 3 may be 2 ° or 3 °.
  • the upper limit of the intersection angle ⁇ 3 may be 9 ° or 8 °.
  • the main cutting edge 6 viewed from the second surface 4 side may be curved as shown in FIG.
  • the center C of the radius of curvature of the main cutting edge 6 viewed from the second surface 4 side may be located closer to the third surface 8 than the fixing hole 32. More specifically, the center C of the radius of curvature is located in a region closer to the first straight portion 6a side than the second straight portion 6d of the main cutting edge 6.
  • the width W1 is the maximum width of the cutting insert 1 in the direction along the reference side when viewed from the first surface 2 side.
  • the width W1 can be set to, for example, 10 mm or more and 20 mm or less.
  • the width W2 shown in FIG. 1 is the flank 31 in the center part of the main cutting edge 6 from the connection part of the main cutting edge 6 and the subcutting edge 7 in the direction along the reference
  • the width W2 can be set to, for example, 8 mm or more and 18 mm or less.
  • a length L in FIG. 1 is a length in a direction perpendicular to the reference side of the cutting insert 1.
  • the length L can be, for example, 10 mm or more and 20 mm or less.
  • the width L1 of the first straight portion 6a in the direction perpendicular to the reference side 11 can be set to 1 mm or more and 3 mm or less, for example.
  • the width L2 of the first curved portion 6b in the direction perpendicular to the reference side 11 can be set to, for example, 1 mm or more and 5 mm or less.
  • the width L3 of the second curved portion 6c in the direction perpendicular to the reference side 11 can be set to, for example, 1 mm or more and 7 mm or less.
  • the width L4 of the second straight line portion 6d in the direction perpendicular to the reference side 11 can be set to, for example, 5 mm or more and 17 mm or less.
  • the curvature radius R1 of the 1st curve part 6b shown in FIG. 5 can be 10 mm or more and 30 mm or less, for example, and the curvature radius R2 of the 2nd curve part 6c can be 20 mm or more and 60 mm or less, for example. .
  • the first and second straight portions 6a and 6d of the main cutting edge 6 viewed from the first surface 2 side are different in the intersecting angles ⁇ 1 and ⁇ 2 with respect to the reference side 11. It has formed so that it may have.
  • the degree of freedom in adjusting the shape of the main cutting edge 6 so as to improve both the machinability and the edge strength can be increased.
  • the first crossing angle ⁇ 1 in the first straight line portion 6a on the side close to the reference side is larger than the second crossing angle ⁇ 2 in the second straight line portion 6d. Yes.
  • the cutting edge strength at the end of the first straight line portion 6a can be increased as compared with the case where the entire main cutting edge 6 is formed in a straight line parallel to the second straight line portion 6d.
  • the machinability is reduced when the cutting depth is increased, for example. Can be suppressed. That is, the durability of the cutting insert 1 can be ensured and high machinability can be ensured even in cutting under severe conditions where the cutting depth is large.
  • the first straight portion 6a and the second straight portion 6d are connected by the curved portion, so that the main cutting edge as a whole can have a smooth shape with no corners. For this reason, generation
  • angular part can be suppressed.
  • the curved portion includes a first curved portion 6b and a second curved portion 6c that are convex in opposite directions. For this reason, the shape of the connection part of the 1st linear part 6a and the 2nd linear part 6d can be made into a smooth curve. For this reason, since the stress concentration in the said connection part can be suppressed rather than the case where the said connection part contains a corner
  • the radius of curvature R1 of the first curved portion 6b and the radius of curvature R2 of the second curved portion 6c can be set to be different from each other.
  • the positions of both ends of the curved portion can be arbitrarily set by appropriately adjusting the two curvature radii R1 and R2. For this reason, even if the extending directions of the first straight portion 6a and the second straight portion 6d are individually changed, the first straight portion 6a and the second straight portion 6d can be easily formed by the curved portion. Can be connected.
  • the first surface 2 of the cutting insert 1 includes a flank 31 that is continuous with the main cutting edge 6 as shown in FIG.
  • the first width W4 of the portion adjacent to the first straight portion 6a can be set to be different from the second width W5 of the portion adjacent to the second straight portion 6d.
  • the widths W4 and W5 of the flank 31 can be adjusted in accordance with the cutting conditions of the first straight portion 6a and the second straight portion 6d. For this reason, high machinability can be obtained as the main cutting edge 6 as a whole.
  • the center C of the radius of curvature of the main cutting edge 6 viewed from the second surface 4 side is located on the third surface 8 side from the fixing hole 32. Also in this case, high machinability can be obtained.
  • the difference between the first intersection angle ⁇ 1 and the second intersection angle ⁇ 2 is 1 ° or more and 5 ° or less.
  • the amount of deviation between the first straight portion 6a and the second straight portion 6d can be made relatively small.
  • the curvature radius of a curve part can be enlarged to some extent or more.
  • the 1st linear part 6a and the 2nd linear part 6d can be smoothly connected by the curve with a big curvature radius. As a result, the cutting surface of the workpiece can be prevented from being rough.
  • the first intersection angle ⁇ 1 is not less than 80 ° and not more than 85 °. In this case, the edge strength of the main cutting edge 6 in the region located on the boundary portion side between the first straight portion 6a and the reference side 11 can be sufficiently increased.
  • the first intersection angle ⁇ 1 is larger than the second intersection angle ⁇ 2. For this reason, the inclination angle of the cutting edge in the second straight part 6d can be made larger than the inclination angle of the cutting edge in the first straight part 6a. As a result, the machinability can be improved.
  • the cutting insert 1 As shown in FIGS. 7 to 10, the cutting insert 1 according to the present embodiment basically has the same configuration as the cutting insert 1 shown in FIGS. 1 to 6, but the first surface 2 is the central portion. 1 and 6 is different from the cutting insert 1 shown in FIGS. 1 to 6 in that it does not have another flank 31 (see FIG. 1) and the third surface is a flat surface.
  • the main cutting edge 6 of the cutting insert 1 shown in FIGS. 7 to 10 includes a first straight part 6a, a curved part, and a second straight part 6d as shown in FIG. Moreover, as can be seen from FIGS. 7 and 8, the first surface 2 is entirely flat.
  • FIG. 11 is a schematic diagram for explaining a modification of the cutting insert according to the present embodiment.
  • FIG. 11 corresponds to FIG.
  • the cutting insert shown in FIG. 11 basically has the same configuration as the cutting insert shown in FIGS. 7 to 10, except that the first intersecting angle ⁇ 1 at the first straight portion 6a of the main cutting edge 6 is 90. It differs from the cutting insert 1 shown in FIGS. 7 to 10 in that it is more than 90 °, more specifically 90 °. In this case, the first intersection angle ⁇ 1 can be, for example, more than 90 ° and not more than 100 °. In this way, the same effects as those of the cutting insert 1 shown in FIGS. 7 to 10 can be obtained, and the edge strength in the vicinity of the first straight portion 6a of the main cutting edge 6 can be further increased.
  • a configuration in which the first crossing angle ⁇ 1 is 90 ° or more or more than 90 ° may be applied to the cutting insert 1 shown in FIGS.
  • FIG. 12 shows a cutting tool 20 using the cutting insert 1 shown in FIGS.
  • the cutting tool 20 shown in FIG. 12 is a milling cutter for corner cutting.
  • the cutting tool 20 includes a cutter body 21 having an outer peripheral surface and the cutting insert 1.
  • the cutting insert 1 is fixed to the outer peripheral surface.
  • a plurality of seat grooves 22 are formed on the outer peripheral surface of the cutter body 21.
  • the cutter body 21 can rotate around the rotation axis.
  • a seat groove 22 is formed on the outer peripheral surface located in the radial direction when viewed from the rotation axis of the cutter body 21.
  • a chip pocket 23 is formed on the outer peripheral surface of the cutter body 21 so as to be adjacent to the seat groove 22.
  • the plurality of seat grooves 22 and the chip pockets 23 are arranged at intervals along the rotation direction of the cutter body 21.
  • the cutting insert 1 is inserted in each seat groove 22.
  • the cutting insert 1 is fixed to the seat groove 22 with mounting screws.
  • the mounting screw is inserted into a fixing hole 32 (see FIG. 1) of the cutting insert 1 and screwed into a screw hole (not shown) formed in the inner wall of the seat groove 22 to be fixed.
  • the lower surface 3 of the cutting insert 1 is in contact with the inner surface 22 a of the seat groove 22. Further, the second surface 4 on the side not involved in the cutting of the cutting insert 1 is supported by the inner surface 22 b of the seat groove 22.
  • the cutter body 21 rotates about the rotation axis, whereby the workpiece is cut by the main cutting edge 6 and the sub cutting edge 7 of the cutting insert 1.
  • a cutting tool 20 capable of performing highly efficient cutting by increasing the amount of cutting at the time of cutting is obtained. be able to.
  • 1 cutting insert 2 1st surface, 3 lower surface, 4 2nd surface, 6 main cutting edge, 6a 1st straight line part, 6b 1st curve part, 6c 2nd curve part, 6d 2nd straight line part, 7 sub Cutting edge, 8 third surface, 11 reference side, 20 cutting tool, 21 cutter body, 22 seat groove, 22a, 22b inner surface, 23 chip pocket, 31 relief surface, 32 fixing hole.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Milling Processes (AREA)
  • Cutting Tools, Boring Holders, And Turrets (AREA)

Abstract

La présente invention concerne un insert de coupe pourvu d'un corps ayant une première surface, une deuxième surface et une troisième surface. La deuxième surface prolonge la première surface et s'étend dans une direction qui coupe la première surface. La troisième surface prolonge la première surface et la deuxième surface. Un trou de fixation est formé dans la première surface. La deuxième surface comprend une surface de vague de coupe. Sur la périphérie externe de la deuxième surface, la frontière avec la première surface est une lame de coupe principale. La lame de coupe principale, vue du côté de la première surface, comprend une première partie linéaire, une seconde partie linéaire et une partie incurvée. La première partie linéaire se trouve plus près d'un côté de référence. La seconde partie linéaire est disposée à une certaine distance de la première partie linéaire. La partie incurvée raccorde la première partie linéaire et la seconde partie linéaire. Un premier angle d'intersection de la première partie linéaire par rapport au côté de référence diffère d'un second angle d'intersection de la seconde partie linéaire par rapport au côté de référence.
PCT/JP2017/008102 2016-03-03 2017-03-01 Insert de coupe et outil de coupe WO2017150608A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US16/073,004 US10632547B2 (en) 2016-03-03 2017-03-01 Cutting insert and cutting tool
EP17760072.3A EP3424631B1 (fr) 2016-03-03 2017-03-01 Insert de coupe et outil de coupe
EP22188553.6A EP4101567A1 (fr) 2016-03-03 2017-03-01 Insert de coupe et outil de coupe
CN201780014906.0A CN108778591B (zh) 2016-03-03 2017-03-01 切削刀具和切削工具
US16/821,542 US11167361B2 (en) 2016-03-03 2020-03-17 Cutting insert and cutting tool

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2016041176A JP6612152B2 (ja) 2016-03-03 2016-03-03 切削インサートおよび切削工具
JP2016-041176 2016-03-03

Related Child Applications (2)

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US16/073,004 A-371-Of-International US10632547B2 (en) 2016-03-03 2017-03-01 Cutting insert and cutting tool
US16/821,542 Continuation US11167361B2 (en) 2016-03-03 2020-03-17 Cutting insert and cutting tool

Publications (1)

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WO2017150608A1 true WO2017150608A1 (fr) 2017-09-08

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PCT/JP2017/008102 WO2017150608A1 (fr) 2016-03-03 2017-03-01 Insert de coupe et outil de coupe

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US (2) US10632547B2 (fr)
EP (2) EP3424631B1 (fr)
JP (1) JP6612152B2 (fr)
CN (2) CN108778591B (fr)
WO (1) WO2017150608A1 (fr)

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Also Published As

Publication number Publication date
CN108778591A (zh) 2018-11-09
US20190030626A1 (en) 2019-01-31
CN111250769A (zh) 2020-06-09
EP3424631B1 (fr) 2022-08-31
EP3424631A1 (fr) 2019-01-09
CN108778591B (zh) 2020-04-07
US20200215625A1 (en) 2020-07-09
EP4101567A1 (fr) 2022-12-14
EP3424631A4 (fr) 2019-10-02
US11167361B2 (en) 2021-11-09
JP6612152B2 (ja) 2019-11-27
CN111250769B (zh) 2021-09-03
US10632547B2 (en) 2020-04-28
JP2017154227A (ja) 2017-09-07

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